FWIW, I've run 4.56, 4.88, 5.13, and 5.57 gears under my car. In the 1/8th mile the difference was so small it wasn't worth the effort. It's been years since I've run any steep gears in the 1/4 so it's hard to say. I currently run either 4.56 or 4.88 and it likes it just fine in either the 1/8 or 1/4.